Disposable erythrocyte sedimentation rate esr pipette offers a simple, Safe, Economical and highly accurate method for performing westergren esr determinations directly in a 12/13mm blood collection tube. The esr pipette is graduated from 0 to 180mm and features a unique fibrous plug located at the zero mark. The plug has been uniquely crafted with sealed barrier that stops hazardous substances from escaping through the highest level of the pipette. Features fine finish safe usage heat & chemical resistance light weight giving easy air access and blocking blood completely medical grade soft rubber skirt gasket ensures smooth and easy entrance to the pipette into eliminating manual, Blood vial suction glass, Like clarity of tube with clear and accurate printed measuring scale.